Send parse errors over the persistent connection as soon as parsing is complete
Send parse errors over the persistent connection as soon as parsing is complete

Summary: Cannot be released until after D4988561 is released. I will time the land to ensure this is the case.

Reviewed By: avikchaudhuri

Differential Revision: D4988553

fbshipit-source-id: 7383e24559b49066dd95d40e96d745845f3ba105

TiddoLangerak/flow,JonathanUsername/flow,claudiopro/flow,samwgoldman/flow,facebook/flow,popham/flow,JonathanUsername/flow,samwgoldman/flow,samwgoldman/flow,ylu1317/flow,samwgoldman/flow,fletcherw/flow,ylu1317/flow,jamesgpearce/flow,ylu1317/flow,TiddoLangerak/flow,fletcherw/flow,samwgoldman/flow,facebook/flow,TiddoLangerak/flow,facebook/flow,TiddoLangerak/flow,nmote/flow,jamesgpearce/flow,claudiopro/flow,fletcherw/flow,fletcherw/flow,popham/flow,fletcherw/flow,claudiopro/flow,MichaelDeBoey/flow,jamesgpearce/flow,AgentME/flow,facebook/flow,nmote/flow,AgentME/flow,popham/flow,mroch/flow,gabelevi/flow,mroch/flow,AgentME/flow,gabelevi/flow,ylu1317/flow,MichaelDeBoey/flow,claudiopro/flow,nmote/flow,jamesgpearce/flow,JonathanUsername/flow,jamesgpearce/flow,samwgoldman/flow,JonathanUsername/flow,popham/flow,AgentME/flow,TiddoLangerak/flow,MichaelDeBoey/flow,nmote/flow,samwgoldman/flow,nmote/flow,nmote/flow,gabelevi/flow,popham/flow,gabelevi/flow,JonathanUsername/flow,mroch/flow,JonathanUsername/flow,popham/flow,facebook/flow,gabelevi/flow,nmote/flow,MichaelDeBoey/flow,MichaelDeBoey/flow,popham/flow,fletcherw/flow,claudiopro/flow,mroch/flow,JonathanUsername/flow,jamesgpearce/flow,facebook/flow,gabelevi/flow,jamesgpearce/flow,gabelevi/flow,ylu1317/flow,mroch/flow,mroch/flow,AgentME/flow,facebook/flow,mroch/flow